Burglar alarm



Oct. 20, 1925. I 1,558,427

7 A. K. BODENHORN I BURGLAR ALARM Filed March 18 93 2 Sheets-Sheet l 7'I 2.6 u r 'm ys v Oct. 20, 1925.

A. K. BODEN HORN BURGLAR ALARM Filed March 18, 1924 t 2 sheets sheet 2Illlllllllfrll rl/IIII A I i .BODE/VHORM erwu Patented Oct. 20, 1925.

I K; BODEZNHORN; 131 "mUmKG-ATE, OAIIIFORNIA.

FBURGLARTALARM.

vApplication filed MarchvlS, .1924. Serial- No. 700,044.-

TOK'CiZZ whom it may concern:

Be it iknown that I, ALBERT K. Bonan- HORN, a citizen of the'UnitedStates, residing at. Southgate, in the county o f Los Angelesand Stateof California, have invented new and useful Improvements in BurglarAlarms, of"-w11ich the following is a specification.

V This Linvention relates to {burglar Pal arms, and it has for one ofits-objects the provision oft-a burglar alarm embodying-gun mechanism.

\Vithvthe foregoing objects .in- View, togetherwith such other objectsand advan- .tages as maysubsequently appear, this invention resides inthe construction and arrangement of parts hereinafter described andclaimed and illustrated in the accompanying 'drawings, -in which Figure1-is a vertical transverse section of the lower part of a window frameand the-.subjacent portion at a wall and showing one form of my burglaralarm, partly'in section, associated withit-he window frame and thewall;

Eig.-2-is.a .view similar 'to 1, showing the window in slightly raised,position andthe resulting effect on the mechanism of the burglar. alarmlFig. 8.is:a View taken onthe lines 8+3 ofFigs. l and 2;

Fig. 4 is a. section taken on vthe line 4-4 of Fig. 1;

(Fig.5 is. a. section taken on-the line 5 -5 liigl 6 isa Viewshowing-the hammer of the, gun

Fig. "7 is a perspective --view ofmeans 'for extracting acartridge fromthe gun;

Fig. 8 is a fragmentary iew-in elevation ofa doora'n'd its jamb with myburglar "alarm set,.the door :being closed :Fig. 9 is. a. crosssection'taken on theline hr-9 ofFigQS;

Fig. 10 isa View similar to Fig. 8,-but showingthe door slightly-openedandJthe resulting .effect on :part of the mechanism of the alarm atfirst-toFigs. 1 and2, the numeral20 indicatesi'the lowerportion of awindow pane which issetzin the lower sash2l. 'The'nu- 1neral"22indicatesthe window sill and"23 indicates ta wall under the window sill, 24Lbeing a lflooiz' The lower sash 21 isprovided with a ertical recess 25positioned medially its inner side'26 and'its outer side 27 andadaptedto ireceive the-upper portion of a"ro'd 28'-having a boss 29. Ahorizontal recess30 is also formed in theme'mber'fzl of the lowersashand extends fromt'he inner face to meet .the "recess The recess '30 isenlargediat its ""inne1"f p0'rtioI-1, as snownut 31in Figs. 1, 2 :andfi,is adapted to receive a member 32havinge knob "33 extending "beyond theinnenface 26. and having a fork '34aa't its inner end.

The fork comprisestwo arcuatev prongs 3a? ancH-St respectively which areresilient and normally engage the portion of the rod 28 atljacenttheboss ""29. The prongs S P and 3%) are provided respectively withoutjwardlycurved lips 34 and 34, the distance between which isnorma'llyless than the di- 'ameterof the rod 28. .A finishing plate 35is securedftothe face 26ofthe member 21 and encircles ithe member 32.Therod 28 extenclsthrough 'an 'aperture 37 formed in The 'windowsill 22,througlra portion of the wa1lf23,:and lt-hrough an aperture 39 formed ina tube 40, which is positioned "transverselyin. the wall 23, and extendsfrom theinnerFfaceL23 .of the wall to the "outer face 23 Thetube 40 hasits outer portion 40: reduced in diameter 'sothat a shoulder 40" isformed. larger portion 40 of the tube 401s formed with alongitudinalrecess 42 in its "lower jportioinitlie recess being clearly shown in"Fig. 4.

The. recess l-2 'slid'ablyreceives the elongated portion 4=3 iof acartridge extractor '44 (shown in Fig. 7) which comprisesa The inner andi flat ring i5gpositioned at anend ofthe'portion 43 and at right anglesthereto. The portion -13 of the cartridge extractor ttextends beyond theinner face 23 of thewall 23, and the ring 21-5 ofi'the "extractor abutsagainstthe.shon1lcle1v40 of the tube 450. A cartridge 46, "\irhich maybe either blank or "loaded, is :placed within "the tube 40, "the tflange "46 ofthe' cartridge abutting. against the ring 45 of theextractor'tt. A hammer 47 'is'positioned partly within the section 40"'otthe' tube '40'and extends beyond the inner face 23 of the wall 23.The hammer 47 Comprises a knob 48 and a peripheral flange 49, the latterbeing positioned near the inner end of the hammer. A. coil con1-pression spring 50 encircles the hammer 47 and is held between theflange 49 and a plate 51 which is removably affixed to the inner face 23of the wall 23 and through which the hammer 4" extends. The plate 51 isprovided with a slot 52, through which the portion 43 of the shellextractor 44 extends, the slot 52 being arcuate and of greater lengththan the width of the member 43. The plate 51, as shown in Fig. 3, isprovided with opposing lugs 53 and 54 having formed therein respectivelyslots 55 and 56, these slots being formed in opposite sides of the lugs.The slots 55 and 56 engage respectively screws 57 and 58 which aresecured to the wall 23.

It will be understood that by forming the plate 51, as described, thesame may be readily removed from the wall by turning it through a smallarc, so that the tube 40 may be opened for the purpose of removing acartridge and inserting another cartridge therein. When the burglaralarm is set, the fork 34 engages the rod 28 immeiately under the boss29, which is wider than the distance between the prongs 34 and 84 of thefork, and the hammer 47 is drawn back, compressing the spring 50, thelower end of the rod 28 abutting against a face of the flange 49 toretain the hammerin retractct position and the spring compressed.

It will thus be seen that when an attempt is made to enter a building byraising the window, as shown in Fig. 2, the fork 34, which rises withthe opening of the window, lifts the rod 28 out of the tube 40, so thatthe hammer 47 is caused by the action of the spring 50 to strike thecartridge 46, which is thereby fired, and, it blank, merely gives analarm. After a cartridge has been used, it may be extracted afterremoving the plate 51 and the hammer 47 with the spring 50, by pullingthe cartridge extractor 44.

At such times when it is not desired to have the burglar alarm set, thefork 34 may be made to disengage the rod 28 by pulling the knob 38 ofthe member so that the fork 34 is pulled into the portion 31 of therecess 30. It will be understood that the window may then be raisedwithout firing the cartridge, as the rod 28 will be retained in the tube40.

Referring now to Figs. 8 to 13 inclusive, the numeral 65 indicates adoor and the numeral (36 indicates the jamb for the door. In thismodification, the tube 40, the shell ex-' tractor 44, the cartridge 46,the hammer 47, the spring 50 and the plate 51 are constructed andpositioned as previously described, except that the tube 40 does notcontain the aperture 39 as described for the first mod'r fication, andthe hammer 47 is provided, in this modification, with a recess 68, theparts enumerated being fitted, in this instance, through the doorj amand the adjacent wall.

lVhen the alarm of this modification is set,

a member 69, pivoted on a screw 70, engages the recess 68 and contactswith the angular face 71 of an extension 72 projecting outwardly from amember 73 secured to the door (35 near the edge of the latter. hen anattempt is made to open the door 65, it will be seen that the member 69will slide upwardly on the face 71 of the extension 72 in the directionshown by the arrow 7 5 in Fig. 8, whereby the member 69 will bedisengaged from the recess 68 in the hammer 47. This action causes thehammer to be released and to be projected against the can fridge 46,firing the same.

lVhile I have herein described two forms of my invention, modificationsthereof may be devised without departing from the spirit thereof, and itis to be understood that such modifications come within the scope ofthis invention.

lVhat is claimed is:

1. A burglar alarm adapted to be as sociated with a wall and with aclosure for an opening, said alarm comprising a tube extending throughthe wall, a cartridge retainable within said tube, a hammer within saidtube, said hammer being adapted to strike said cartridge to fire thesame, a coiled spring encircling said hammer, means associated with theclosure for keeping said hammer in retracted position and said springcompressed when the closure is closed, said means being adapted to beactuated by the opening of the closure to release said hammer for impactagainst said cartridge, said hammer being urged against said cartridgeby the expansion of said spring, and means for extracting saidcartridge, and means comprising a slotted face plate for permitting saidhammer and said cartridge to be withdrawn from said tube.

2. A burglar alarm adapted to be associated with a wall and with aclosure for an opening, said alarm comprising a tube extending throughthe wall, a cartridge retainable within said tube, a hammer within saidtube, said hammer being adapted to strike said cartridge to fire thesame, a coiled spring encircling said hammer, means associated withthe'closure for keeping said ham- .nier in retracted position and saidspring compressed when the closure is closed, said means being adaptedto be actuated by the opening of the closure to release said hammer forimpact against said cartridge, said hammer being urged against saidcartridge by the expansion of said spring, means for extracting saidcartridge, and means positioned on the inner face of the wall fornormally closing one end of said tube, said closmg means being adaptedto be readily detached to allow the removal of said cartridge and saidhammer.

3. A. burglar alarm adapted-to be associated with a wall and with aclosure for an opening, said alarm comprising a tube extending throughthe wall, a cartridge retainable within said tube, a hammer within saidtube, said hammer being adapted to strike said cartridge to fire thesame, a coiled spring encircling said hammer, means associated with theclosure for keeping said hammer in retracted position and said springcompressed whenthe closure is closed, said means being adapted to beactuated by the opening of the closure to release said hammer for impactagainst said cartridge, said hammer being urged against said cartridgeby the expansion of said spring, means for extracting said cartridge,and means positioned on the inner face of the wall for normally closingone end of said tube, said closing means being adapted to be readilydetached to allow the removal of said cartridge, and comprising a plateand means for fastening the plate, said fastening means engaging slotsin the plate, the slots being arranged to be disengaged from saidfastening means by a turning of said plate.

4. A burglar alarm adapted to be associated with a wall and a closurefor an opening, said alarm comprising a tube extending through the wall,a cartridge re tainable within said tube, a hammer within said tube,said hammer being adapted to strike said cartridge to fire the same,actuating means associated with the closure and with said hammer forkeeping said hammer in retracted position when the closure is closed,said actuating means extending into the body of the closure beingadapted to be actuated by the opening of the closure to release saidhammer for impact against said cartridge, and means for releasing saidactuated means.

5. A burglar alarm adapted to be a sociated with a Wall and a closurefor an opening, said alarm comprising a tube extending through the wall,a cartridge retainable Within said tube, a hammer within said tube, saidhammer being adapted to strike said cartridge to fire the same, meansassociated with the closure and with said hammer for keeping said hammerin retracted position when the closure is closed, said means beingadapted to be actuated by the opening of the closure to release saidhammer for impact against said cartridge, means for extracting saidcartridge, and means positioned on the inner face ofthe wall fornormally closing one end of said tube, said closing means being adaptedto be readily detached to allow the removal of said cartridge.

6. A burglar alarm adapted to be associated with a wall and a closurefor an opening, said alarm comprising a tube extending through the wall,a cartridge retainable within said tube, a hammer within said tube, saidhammer being adapted to strike said cartridge to fire the same, meansassociated with the closure and with said hammer for keeping said hammerin re tracted position when the closure is closed, said means beingadapted to be actuated by the opening of the closure to release saidhammer for impact against said cartridge, means for extracting saidcartridge, and comprising a plate and means for fastening the plate,said fastening means engaging slots in the plate, the slots beingarranged to be disengaged from said fastening means by a turning of saidplate.

7. A burglar alarm comprising a tube having an enlarged end and areduced end, said reduced end being adapted to retain a cartridgetherein adjacent the enlarged end, a cover plate for the enlarged end, ahammer slidable through said cover plate into said enlarged end, aspring disposed within said enlarged end about said hammer, so as tourge said hammer to strike said cartridge, means for holding said hammerin retracted position, said means being associated with a closure,whereby opening movement of the closure will cause said means to releasesaid hammer so as to strike the cartridge, said cover plate beingremovably positioned over the enlarged end, and a cartridge extractorextending through said cover plate and into said enlarged end.

In testimony whereof I have signed my name to this specification.

ALBERT K, BODENHORN.

Oil

